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Journal : BERITA BIOLOGI

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PENGARUH PERBEDAAN PADAT TEBAR LARVA TERHADAP PERTUMBUHAN DAN SINTASAN PADA IKAN UCENG (Nemacheilus fasciatus) Jojo Subagja; Vitas Atmadi Prakoso; Otong Zenal Arifin; Anang Hari Kristanto
BERITA BIOLOGI Vol 18, No 2 (2019)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v18i2.3561

Abstract

Proper stocking density on larval rearing of barred loach (Nemacheilus fasciatus Valenciennes, 1846) is very important in terms of obtaining the best growth and survival rate. This study was aimed to observe the growth and survival rate of barred loach subjected to different larval stocking density. Fish larvae were obtained by artificial spawning from in aquarium. Larvae were stocked on aquariums (50 × 40 × 30 cm) with three stocking density treatments (5, 10, and 15 individuals/L) and three replications. The experimental fish larvae were fed by Artemia and commercial feed (crude protein content: 30%) and feeding frequency twice per day (ad libitum). The length and weight were reassured every 10 days during 70 days of rearing period. Temperature, pH, and dissolved oxygen were measured at each treatment. Data obtained from measurements were analysed to assess the length gain, weight gain, specific growth rate (SGR), biomass gain, and survival rate. The results showed length gain of 3.35 ± 0.01, 2.94 ± 0.10, and 2.82 ± 0.15 cm and weight gain of 0.573 ± 0.023, 0.436 ± 0.018, and 0.417 ± 0.043 g in larval stocking density of 5, 10 and 15 individuals/L, respectively. Specific growth rates and biomass growth were of 6.22 ± 0.41, 5.93 ± 0.21, and 5.68 ± 0.41 %/day and 94.04 ± 5.39, 146.80 ± 3.81, and 167.24 ± 17.48 g in larval stocking density of 5, 10 and 15 individuals/L, respectively. Meanwhile, the survival rates obtained in this study were 89.13 ± 7.25, 93.13 ± 5.13, and 76.50 ± 3.54 % in larval stocking density of 5, 10 and 15 individuals/L, respectively. Increased stocking density has a negative impact on the growth and survival rate of barred loach.
PERKEMBANGAN EMBRIO DAN PERFORMA AWAL LARVA TIGA SPESIES IKAN TOR INDONESIA Wahyulia Cahyanti; Deni Radona; Anang Hari Kristanto
BERITA BIOLOGI Vol 19, No 3A (2020)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v19i3A.3832

Abstract

Tor fish is a potential local fish. It has social, economic and religious value and contains albumin which is equivalent to snake head fish. As a local fish cultivation potential, an accurate description of the early development stages of this species, will have value for ichthyologists and can facilitate cultivation efforts to increase production. This study aims to understand the embryology of three tor fish species and to determine the condition of larval performance at the beginning of hatching. The division process begins when the cell nucleus is divided into 2 blastomers, then continues to reach 32 cells in the first 10 hours after fertilization. At 10–20 hours after fertilization the eggs enter the morula, blastula and gastrula phases. After 20 hours, the organogenesis stage occurs. Tor douronensis hatched the fastest, more than 100 hours after fertilization (0.70–0.80 cm length, 0.0073 g weight and 8.40±1.83% abnormality). Tor soro over 120 hours (length 0.80–0.90 cm, weight 0.0125 g and abnormality 2.47±0.12%) and Tor tambroides above 140 hours after fertilization (length 1,00–1,09 cm, weight 0,0146 g and abnormality 2.93±0.31%). It can be concluded that there is no difference in the process of embryogenesis of the three species until the gastrula stage. The difference arises in the organogenesis phase, where the Tor douronensis organ develops most rapidly, followed by Tor soro and Tor tambroides.  
Co-Authors Adang Saputra Brata Pantjara Deni Radona Irin Iriana Kusmini Jojo Subagja Lies Setijaningsih Otong Zenal Arifin Vitas Atmadi Prakoso Wahyulia Cahyanti Yohanna Retnaning Widyastuti